Dtc B2782 Power Source Control Ecu Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (GROUND)

INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) (MOTOR ACTIVATION COMMAND SIGNAL)

CLEAR DTC AND DATA LIST MALFUNCTION RECORD

CHECK DTC

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

DESCRIPTION

HINT:

The steering lock ECU (steering lock actuator assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator assembly) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).

1. *: Only output while a malfunction is present and the engine switch is on (IG).
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus:
   Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
   
2. The steering lock system uses LIN communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting (Click here).
   
3. When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected (Click here ).
   
4. After performing repairs, perform the DTC output confirmation operation, and then confirm that no DTCs are output again (Click here).
   
5. When replacing the steering lock ECU (steering lock actuator assembly), registration must be performed (refer to Service Bulletin).
   

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.
   

2. Disconnect the E26 steering lock ECU (steering lock actuator assembly) connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E26-1 (GND) - Body ground	Always	Below 1 Ω

   Text in Illustration

   *a	Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator Assembly))

1. Reconnect the E26 steering lock ECU (steering lock actuator assembly) connector.
   

2. Turn the engine switch off, make sure that the steering is unlocked and move the shift lever to P.
   

3. Check the signal waveform according to the condition(s) in the table below.
   

   Standard Frequency

   Item	Content
   Tester Connection	E26-3 (IGE) - E26-1 (GND)
   Tool Setting	2 V/DIV., 200 ms./DIV.
   Vehicle Condition	Steering lock motor not operating → Steering lock motor operating → Steering lock motor not operating

   Text in Illustration

   *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))
   *b	Steering lock motor not operating
   *c	Steering lock motor operating

   HINT:

   1. When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
      
   2. In order to take measurements when the lock motor is operating, perform either of the following operations:
      
   1. To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG) with the shift lever in P.
      
   2. To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.
      

1. Clear the DTCs (Click here).
   

2. Disconnect the cable from the negative (-) battery terminal, wait for 30 seconds or more, and then reconnect the cable to the negative (-) battery terminal to clear the record of malfunctions stored in the Data List.
   

   NOTICE:

   After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notices before proceeding with work (Click here).

1. Perform the DTC output confirmation operation.
   

2. Check if DTC B2782 is output (Click here).
   

   Result:

   Result	Proceed to
   DTC B2782 is not output.	A
   DTC B2782 is output (for Manual tilt and telescopic steering column).	B
   DTC B2782 is output (for Power tilt and telescopic steering column).	C

1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
   

2. Disconnect the E26 steering lock ECU (steering lock actuator assembly) connector.
   

3. Disconnect the E130 certification ECU (smart key ECU assembly) connector.
   

4. Check for deformation and corrosion of the connector case and terminals.
   

   OK:

   There is no deformation or corrosion of the connector case or terminals.
   

5. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E26-3 (IGE) - E130-24 (SLR+)	Always	Below 1 Ω
   E26-3 (IGE) - Body ground	Always	10 kΩ or higher
   E130-24 (SLR+) - Body ground	Always	10 kΩ or higher